24PN vs 30PN

I have a question, and nobody can seem to give me an answer. I have a Panasonic HVX200. When I shoot 24PN, the time on the cards nearly doubles. I know the reason for that, is because it is recording without the pulldown, so it is getting rid of the additional frames. What confuses me, is why then if I shoot 30PN, I get the same amount of storage as if I am shooting 24PN? It has no frames to remove. So confused.
CT

Let me confuse you more. There is no removal of frames in PN mode. When you shoot 24pn, it records exactly 24 frames. When you shoot 30pn, it shoots exactly 30 frames. PN (native frames) only records frames needed.

24 pn = 42 minutes 16 gb card.
30 pn = 34 minutes 16 gb card.

No need to be confused. P2 cards takes the worry out of pulldown (removal of frames).